Pipe Insulation Material Thermal Conductivity

A low thermal conductivity allows specified thermal performance standards to be achieved with thinner insulation.

Pipe insulation material thermal conductivity.

With a 25 year aged thermal conductivity as low as 0 025 w m k at 10 c mean kooltherm pipe insulation is one of the most thermally efficient insulation material commonly used. For this reason it is more common to use the thermal conductivity value when comparing the effectiveness of pipe insulation and r values of pipe. Thus less insulating material will be required. Thermal conductivity is a material property that describes ability to conduct heat thermal conductivity can be defined as the quantity of heat transmitted through a unit thickness of a material in a direction normal to a surface of unit area due to a unit temperature gradient under steady state conditions.

Various insulation material thermal conductivity chart. Insulation materials and properties mp 3 2 3 1 thermal properties of insulation thermal properties are the primary consideration in choosing insulations. Insulation used is glass mineral wool with thermal conductivity for that temperature range of 0 035w m k. Desirable characteristics for insulation materials for fish holds.

Types i ii iii iv astm c795 thermal insulation for use in contact with austenitic stainless steel5 mil prf 22344e insulation pipe thermal fibrous glass nuclear regulatory commission guide 1 36 non metallic thermal insulation 5 mil dtl 24244d ships insulation material with special. It prevents condensation reduces energy losses and protects against frost on pipes air ducts and vessels. Hydrogen thermal conductivity online calculator figures and table showing thermal conductivity of hydrogen h 2 at varying temperature and pressure imperial and si units. Dry stagnant gas is one of the best insulating materials.

Armaflex class o is a highly flexible closed cell nitrile rubber insulation material with high water vapor diffusion resistance and low thermal conductivity. Upper and lower temperatures within which the material must retain all its properties. Best insulation materials should have the lowest thermal conductivity in order to reduce the total coefficient of heat transmission. Insulation material thermal conductivity chart.

For pipe insulation the r value varies not only with the insulation thickness and thermal conductivity k value but also with the pipe outer diameter and the average material temperature. Refer to the following glossary for definitions. R values per inch given in si and imperial units typical values are approximations based on the average of available results. Insulated pipes heat loss diagrams heat loss w m from insulated pipes ranging 1 2 6 inches insulation thickness 10 80 mm temperature differences 20.

Allowed heat loss per meter of pipe is 80 w m. Suppose we have a pipe of diameter 12 with hot oil at a temperature of 200 c flowing through it.